import sys
sys.path.append('../../../scripts')
import base
import os

def make(build_js = True):

  old_cur_dir = os.getcwd()
  #fetch libhunspell
  print("[fetch & build]: hunspell")
  base_dir = base.get_script_dir() + "/../../core/Common/3dParty/hunspell"
  os.chdir(base_dir)
  if not base.is_dir("hunspell"):
      last_stable_commit = "8a2fdfe5a6bb1cbafc04b0c8486abcefd17ad903"
      repo_path = "https://github.com/hunspell/hunspell.git"
      base.cmd("git", ["clone", repo_path])
      os.chdir("hunspell")
      base.cmd("git", ["checkout", last_stable_commit])
      base.replaceInFile("./src/hunspell/filemgr.hxx", "FileMgr& operator=(const FileMgr&);", "FileMgr& operator=(const FileMgr&); \n" 
          +" #ifdef HUNSPELL_WASM_MODULE \n char* memory;size_t index;size_t size; \n #endif") #custon filemgr support watch filemgr_wrapper_new.cxx
      os.chdir("../")

  if not build_js:
    os.chdir(old_cur_dir)
    return
  base.configure_common_apps()

  # remove previous version
  if base.is_dir("./deploy"):
    base.delete_dir("./deploy")
  base.create_dir("./deploy")
  base.create_dir("./deploy/spell")

  # fetch emsdk
  command_prefix = "" if ("windows" == base.host_platform()) else "./"
  if not base.is_dir("emsdk"):
    base.cmd("git", ["clone", "https://github.com/emscripten-core/emsdk.git"])
    os.chdir("emsdk")
    base.cmd(command_prefix + "emsdk", ["install", "latest"])
    base.cmd(command_prefix + "emsdk", ["activate", "latest"])
    os.chdir("../")

  # compile
  compiler_flags = ["-o spell.js",
                    "-O3",
                    "-fno-exceptions",
                    "-fno-rtti",
                    "-s WASM=1",
                    "-s ALLOW_MEMORY_GROWTH=1",
                    "-s FILESYSTEM=0",
                    "-s ENVIRONMENT='web,worker'"]

  exported_functions = ["_malloc",
                        "_free",
                        "_Spellchecker_Malloc",
                        "_Spellchecker_Free",
                        "_Spellchecker_Create",
                        "_Spellchecker_Destroy",
                        "_Spellchecker_AddDictionary",
                        "_Spellchecker_RemoveDicrionary",
                        "_Spellchecker_Load",
                        "_Spellchecker_Spell",
                        "_Spellchecker_Suggest",
                        "_Spellchecker_RemoveEngine",
                        "_Spellchecker_TotalAllocatedMemory"]

  version_hunspell = 17
  libhunspell_src_path = "./hunspell/src/hunspell"

  input_sources = ["affentry.cxx",
                  "affixmgr.cxx",
                  "csutil.cxx",
                  "dictmgr.cxx",
                  "hashmgr.cxx",
                  "hunspell.cxx",
                  "hunzip.cxx",
                  "phonet.cxx",
                  "replist.cxx",
                  "suggestmgr.cxx"]

  sources = []
  for item in input_sources:
    if base.is_file(libhunspell_src_path + "/" + item):
      sources.append(libhunspell_src_path + "/" + item)

  if (13 == version_hunspell):
    sources.append("./wasm/src/filemgr_wrapper.cxx")
  else:
    sources.append("./wasm/src/filemgr_wrapper_new.cxx")

  sources.append("./wasm/src/base.cpp")

  compiler_flags.append("-I" + libhunspell_src_path)
  compiler_flags.append("-DWIN32 -DNDEBUG -DHUNSPELL_STATIC -DBUILDING_LIBHUNSPELL -DHUNSPELL_WASM_MODULE")

  # arguments
  arguments = ""
  for item in compiler_flags:
    arguments += (item + " ")

  arguments += "-s EXPORTED_FUNCTIONS=\"["
  for item in exported_functions:
    arguments += ("'" + item + "',")
  arguments = arguments[:-1]
  arguments += "]\" "

  for item in sources:
    arguments += (item + " ")


  # command
  windows_bat = []
  if (base.host_platform() == "windows"):
    windows_bat.append("call emsdk/emsdk_env.bat")
    windows_bat.append("call emcc " + arguments)  
  else:
    windows_bat.append("#!/bin/bash")
    windows_bat.append("source ./emsdk/emsdk_env.sh")
    windows_bat.append("emcc " + arguments)  
  base.run_as_bat(windows_bat)

  # finalize
  base.replaceInFile("./spell.js", "__ATPOSTRUN__=[];", "__ATPOSTRUN__=[function(){self.onEngineInit();}];")
  base.replaceInFile("./spell.js", "function getBinaryPromise(){", "function getBinaryPromise2(){")

  spell_js_content = base.readFile("./spell.js")
  engine_base_js_content = base.readFile("./wasm/js/spell.js")
  engine_js_content = engine_base_js_content.replace("//module", spell_js_content)

  # write new version
  base.writeFile("./deploy/spell/spell.js", engine_js_content)
  base.copy_file("spell.wasm", "./deploy/spell/spell.wasm")

  # ie asm version
  arguments = arguments.replace("WASM=1", "WASM=0")

  # command
  windows_bat = []
  if (base.host_platform() == "windows"):
    windows_bat.append("call emsdk/emsdk_env.bat")
    windows_bat.append("call emcc " + arguments)  
  else:
    windows_bat.append("#!/bin/bash")
    windows_bat.append("source ./emsdk/emsdk_env.sh")
    windows_bat.append("emcc " + arguments)  
  base.run_as_bat(windows_bat)

  # finalize
  base.replaceInFile("./spell.js", "__ATPOSTRUN__=[];", "__ATPOSTRUN__=[function(){self.onEngineInit();}];")
  base.replaceInFile("./spell.js", "function getBinaryPromise(){", "function getBinaryPromise2(){")

  spell_js_content = base.readFile("./spell.js")
  engine_base_js_content = base.readFile("./wasm/js/spell.js")
  engine_base_js_polyfill = base.readFile("./wasm/js/polyfill.js")
  engine_js_content = engine_base_js_polyfill + "\n\n" + engine_base_js_content.replace("//module", spell_js_content)

  # write new version
  base.writeFile("./deploy/spell/spell_ie.js", engine_js_content)
  base.copy_file("spell.js.mem", "./deploy/spell/spell.js.mem")

  base.copy_file("./wasm/js/code.js", "./deploy/spell.js")
  base.copy_file("./wasm/js/index.html", "./deploy/index.html")

  base.delete_file("spell.js")
  base.delete_file("spell.js.mem")
  os.chdir(old_cur_dir)


if __name__ == '__main__':
  # manual compile
  make(True)
